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Arxiv: Spider-Webb: JWST Near Infrared Camera resolved galaxy star formation and nuclear activities in the Spiderweb protocluster at z=2.16 Published: 10/15/2024 4:25:51 AM Updated: 10/15/2024 4:25:51 AM

Paper abstract: Near-infrared (NIR) emission is less affected by dust than UV and opticalemission and is therefore useful for studying the properties of dust-obscuredgalaxies. Although rest-frame NIR observations of high-redshift galaxies havelong been made using space telescopes, their structures were unresolved due tothe lack of angular resolution. This letter reports the early results from theanalysis of high-resolution Pa\beta imaging of the Spiderweb protocluster atz=2.16 with the JWST Near Infrared Camera. We investigate radial profiles ofPa\beta lines and rest-frame NIR continua from luminous H\alpha-emittinggalaxies (HAEs) in the protocluster. Particularly, we compare those of 11 HAEs(N-HAEs) on the star-forming main sequence with those of 8 HAEs (X-HAEs) withX-ray AGNs. Resultant composite Pa\beta line images of N-HAEs indicatesignificant star formation in galactic disks. In contrast, X-HAEs are dominatedby point source components rather than outer star formation, as inferred fromour earlier work based on multi-wavelength SED fitting. Given their higherstellar potentials suggested from their rest-frame NIR images, the differentcharacteristics may be driven by the impact of AGN feedback.